Uniformity will vary from unit to unit. It is possible that you got one with worst than average uniformity, or you could be more sensitive to it, or perhaps it's both. Either way if it really bothers you in day to day normal use I would suggest exchanging it for a another one and see if it's any better to live with before throwing in the towel.

I’ll give it a bit of time to break in, but yeah, this is disappointing otherwise.